Relief-valve



L. E. MACBRYDE. RELrEF VALVE;

APPLICATION HLED FEB. 28. !9I9.

Patented June 15, 1920.

2 SHEETS-SHLEI .I.

M 613mb@ du,

L. E. IVIACBRYDE.

'RELIEF VALVE.

APPLICATION FILED FEB.28,1919.

Patented J une 15, ?920 2 SHEETS-SHLEI 2.

, Mmm/Er.

LOUIS E. MACBRYDE, OF NEWARK,

NEW JERSEY, ASSIGNOR VTO GEORGE FOS-TORIA, OI-IIO.

sivynnn, or"` RELIEF-VALVE.

Speclcationof Letters Patent. Patentd June 15,` 1920 Application led `February 28, 1919. Serial No. 279,863.

To all 107mm may concern:

Be it known that I, Louis E. MACBRYDn, a citizen of the United States, and a resident or Newark, in the countyof Essex and such heating system with. a relief pipe lead-` ing to the `root` or the like and to insert in such relieitpipe a back pressure valve whichwill open in case of an accident Vor theI like which might cause 4the live steam tobe supplied at a pressure'too high for the heating system. It willbe understood by those skilled in the art that the normal pressure of such a heating system is about live pounds, and that the live steam which is introduced is.' reduced from three hundred pounds more or less, so that` ii:` the reducing valveishould get out of order, the results would be disastrous except for such a back pressure valve as I have mentioned. Valves ofthisftype are alsoused where it is de sired to maintain a vacuum, such as on a condenser, with vacuum pans or the like, and obtain relief should anything happen that would result in loss of vacuum and the accumulation of pressure.` In `that case they valve isof course set to open under a quan ter of. a pound or other small pressure and afford a communication with the atmosphere;

l mention these two uses only by way of illustration, and of course without restrictingL my improved valve for any purpose to which it isadapted.

The objects of myinventioii are to secur a back pressure or atmospheric relierl valve which will operate under a` wide range of pressures; to secure a valve which willnot chatter and will be noiseless; to provide the valve, for this purpose, with a plurality or individual ports each controlled by a spring valve; to thus enable one or more ports to open according to the amountA of pressure to be` relieved; to enable all `the spring For.

valves to be set at once and by a single op.- eration; to prevent the springs from becoming distorted or set, and. facilitate keeping them alined; l and setting means,which will not be forced out of place by improper manipula-tion of the valve; to provide a water seal for the valve, and to obtain other advantages and results as may be brought out in the followingdescription. 7 i Referring to the accompanying drawings, in which like numerals of reference indicate the same parts throughout the several views, y

Figure l isa central sectional viewy of ai valve of my l improved construction;

Fig. 2 is a plan of the same in` section on line 2-2, Fig. l; Y, i

Fig. 3 is a planview of theivalveseat plate with the seat rings therein;l y w Fig. t is a perspective view` of the setting plate, with one of the traveling wedges thereon, and 4 Fig. 5 is arperspective-view of a modified form of traveling wedge.

ln the speciic embodiment of' the inven-` tion shown in said drawings, l indicates the body portion oit' the valve, provided at one side with a hand hole 2 :and cover' there.- ior to `permit access tothe interior chamber and parts therein. A top 4 and a bottom `5 are bolted to the body portion l` andadapted to receive suitable pipe connections. Between the .body portion l `and bottom 5 is f clamped a plate G, which I, haveY shown providing` a transverse row oi three valve seats '7 screwed into the plate that `number or less having been found best adapted to my purpose. Each of these valve seats 7 has a spider bar 8 providing a stem4 9,saidfstem being surrounded by :a buffer l0 of rubber or the like, and? the valvev seatV also hasa similar gasket l1. YA valve l2 is adapted to seat on said gasket and'form an impervious jointtlierewith, said valveibeing centrally apertured to slide on the stem 9 and engage the bulii'er l0 thereon so that it willclose imperviously and noiselessly. f For `closing the valve, a .spring `13 seatsL against its `upper side and receives at its topa spring bearing Y lllrecessed at its upper side as at l5 fora pin 16 which engages at its opposite endthe to secure a main shaft or stem,

setting plate 17. It will be understood that viding a plurality of valve seats, valves for said seats, springs one for each of said valves normally holding'the same seated, a setting plate having oppositely inclined track portions, traveling Wedges engaging said track` portions, a shaft having right and left hand threaded portions receiving said Wedges, and a spring on said shaft en gaging said Wedges at its opposite ends.

4. ln a relief valve, the combination With a body portion, of a transverse plate providing a plurality of valve seats, valves for said seats, springs one for each of said valves, spring bearings one for each of said springs and centrally socketed, a setting plate having sockets one opposite each of said spring bearing sockets, pins each having its ends engaging opposite spring'bearing and setting plate sockets, and means for forcing said setting plate toward the valve scat plate.

5. In a relief valve, the combination with a body portion, of a transverse plate providing a plurality of valve seats, valves for said seats, springs one for each of Vsaid valves, spring hearings one for each of said springs, a setting plate, pins each having its ends `engaging one of said spring bearings and the setting plate, and means for forcing said setting plate toward the valve seat plate.

6. In a relief valve, the combination With a body portion, of a transverse plate providing a plurality of valve seats each having a central stem, annular buffers one at the base of each of said stems, valves for said seats slidable on said stems and engaging said buffers, springs one for each of said valves normally holding the same seated, and means for seating all said springs simultaneously.

LOUIS E. MACBRYDE. 

